[INFO] crate ucg 0.6.3 is already in cache
[INFO] extracting crate ucg 0.6.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/ucg/0.6.3
[INFO] extracting crate ucg 0.6.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ucg/0.6.3
[INFO] validating manifest of ucg-0.6.3 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ucg-0.6.3 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ucg-0.6.3
[INFO] finished frobbing ucg-0.6.3
[INFO] frobbed toml for ucg-0.6.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/ucg/0.6.3/Cargo.toml
[INFO] started frobbing ucg-0.6.3
[INFO] finished frobbing ucg-0.6.3
[INFO] frobbed toml for ucg-0.6.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ucg/0.6.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ucg-0.6.3 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/ucg/0.6.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 85283642659ac47952aa51a6e26b78183afcb48838cdc2d727632e0f258cbc19
[INFO] running `"docker" "start" "-a" "85283642659ac47952aa51a6e26b78183afcb48838cdc2d727632e0f258cbc19"`
[INFO] [stderr]    Compiling utf8parse v0.1.1
[INFO] [stderr]    Compiling abortable_parser v0.2.3
[INFO] [stderr]    Compiling textwrap v0.8.0
[INFO] [stderr]    Compiling ucg v0.6.3 (/opt/crater/workdir)
[INFO] [stderr]    Compiling rustyline v4.1.0
[INFO] [stderr]    Compiling clap v2.26.2
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ast/walk.rs:127:30
[INFO] [stderr]     |
[INFO] [stderr] 127 |     handle_value: Option<&'a Fn(&mut Value)>,
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Value)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ast/walk.rs:128:35
[INFO] [stderr]     |
[INFO] [stderr] 128 |     handle_expression: Option<&'a Fn(&mut Expression)>,
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Expression)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ast/walk.rs:129:33
[INFO] [stderr]     |
[INFO] [stderr] 129 |     handle_statment: Option<&'a Fn(&mut Statement)>,
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Statement)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ast/walk.rs:141:48
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn with_value_handler(mut self, h: &'a Fn(&mut Value)) -> Self {
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Value)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ast/walk.rs:146:47
[INFO] [stderr]     |
[INFO] [stderr] 146 |     pub fn with_expr_handler(mut self, h: &'a Fn(&mut Expression)) -> Self {
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Expression)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ast/walk.rs:151:47
[INFO] [stderr]     |
[INFO] [stderr] 151 |     pub fn with_stmt_handler(mut self, h: &'a Fn(&mut Statement)) -> Self {
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Statement)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/env.rs:31:68
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn convert_tuple(&self, flds: &Vec<(String, Rc<Val>)>, w: &mut IOWrite) -> ConvertResult {
[INFO] [stderr]    |                                                                    ^^^^^^^ help: use `dyn`: `dyn IOWrite`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/env.rs:47:60
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn convert_list(&self, _items: &Vec<Rc<Val>>, _w: &mut IOWrite) -> ConvertResult {
[INFO] [stderr]    |                                                            ^^^^^^^ help: use `dyn`: `dyn IOWrite`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/env.rs:52:38
[INFO] [stderr]    |
[INFO] [stderr] 52 |     fn write(&self, v: &Val, w: &mut IOWrite) -> ConvertResult {
[INFO] [stderr]    |                                      ^^^^^^^ help: use `dyn`: `dyn IOWrite`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/env.rs:94:47
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn convert(&self, v: Rc<Val>, mut w: &mut IOWrite) -> ConvertResult {
[INFO] [stderr]    |                                               ^^^^^^^ help: use `dyn`: `dyn IOWrite`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/exec.rs:40:38
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn write(&self, v: &Val, w: &mut Write) -> ConvertResult {
[INFO] [stderr]    |                                      ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/exec.rs:176:47
[INFO] [stderr]     |
[INFO] [stderr] 176 |     fn convert(&self, v: Rc<Val>, mut w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/flags.rs:39:62
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn write_flag_name(&self, pfx: &str, name: &str, w: &mut Write) -> ConvertResult {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/flags.rs:53:17
[INFO] [stderr]    |
[INFO] [stderr] 53 |         w: &mut Write,
[INFO] [stderr]    |                 ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/flags.rs:71:51
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn write_simple_value(&self, v: &Val, w: &mut Write) -> ConvertResult {
[INFO] [stderr]    |                                                   ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/flags.rs:97:71
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn write(&self, pfx: &str, flds: &Vec<(String, Rc<Val>)>, w: &mut Write) -> ConvertResult {
[INFO] [stderr]    |                                                                       ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/flags.rs:121:47
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn convert(&self, v: Rc<Val>, mut w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/json.rs:119:38
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn write(&self, v: &Val, w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                      ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/json.rs:127:47
[INFO] [stderr]     |
[INFO] [stderr] 127 |     fn convert(&self, v: Rc<Val>, mut w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/toml.rs:29:52
[INFO] [stderr]    |
[INFO] [stderr] 29 | type Result = std::result::Result<toml::Value, Box<error::Error>>;
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/toml.rs:110:38
[INFO] [stderr]     |
[INFO] [stderr] 110 |     fn write(&self, v: &Val, w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                      ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/toml.rs:119:47
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn convert(&self, v: Rc<Val>, mut w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/traits.rs:30:44
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn convert(&self, vs: Rc<Val>, w: &mut Write) -> ConvertResult;
[INFO] [stderr]    |                                            ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/xml.rs:156:38
[INFO] [stderr]     |
[INFO] [stderr] 156 |     fn write(&self, v: &Val, w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                      ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/xml.rs:226:47
[INFO] [stderr]     |
[INFO] [stderr] 226 |     fn convert(&self, v: Rc<Val>, mut w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/yaml.rs:116:38
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn write(&self, v: &Val, w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                      ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/convert/yaml.rs:124:47
[INFO] [stderr]     |
[INFO] [stderr] 124 |     fn convert(&self, v: Rc<Val>, mut w: &mut Write) -> ConvertResult {
[INFO] [stderr]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/mod.rs:58:72
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn register<S: Into<String>>(&mut self, typ: S, converter: Box<traits::Converter>) {
[INFO] [stderr]    |                                                                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn traits::Converter`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/mod.rs:62:55
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn get_converter(&self, typ: &str) -> Option<&traits::Converter> {
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn traits::Converter`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/convert/mod.rs:66:60
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn get_converter_list(&self) -> Vec<(&String, &Box<traits::Converter>)> {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn traits::Converter`
[INFO] [stderr] 
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> src/build/mod.rs:231:22
[INFO] [stderr]     |
[INFO] [stderr] 231 |                     .as_ref(),
[INFO] [stderr]     |                      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: Could not compile `ucg`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "85283642659ac47952aa51a6e26b78183afcb48838cdc2d727632e0f258cbc19"`
[INFO] running `"docker" "rm" "-f" "85283642659ac47952aa51a6e26b78183afcb48838cdc2d727632e0f258cbc19"`
[INFO] [stdout] 85283642659ac47952aa51a6e26b78183afcb48838cdc2d727632e0f258cbc19